/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --secondary: #7c3aed;
  --secondary-light: #8b5cf6;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #f1f5f9;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.18);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --nav-height: 72px;
}
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); color: var(--text); background: var(--bg); line-height: 1.6; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; outline: none; }
ul, ol { list-style: none; }
/* ===== Utility ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 12px; line-height: 1.3; }
.section-subtitle { font-size: 1.05rem; color: var(--text-light); max-width: 640px; line-height: 1.7; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .section-subtitle { margin: 0 auto; }
.text-center { text-align: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-md);
  font-size: 0.95rem; font-weight: 600; transition: var(--transition); line-height: 1.2;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(37,99,235,0.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(37,99,235,0.45); }
.btn-secondary { background: var(--bg-card); color: var(--primary); border: 1.5px solid var(--border); }
.btn-secondary:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-accent { background: var(--accent); color: #1e293b; box-shadow: 0 4px 14px rgba(245,158,11,0.35); }
.btn-accent:hover { background: #eab308; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,158,11,0.45); }
.badge {
  display: inline-block; padding: 4px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 500;
  background: rgba(37,99,235,0.1); color: var(--primary); letter-spacing: 0.3px;
}
.badge-orange { background: rgba(245,158,11,0.12); color: #b45309; }
.badge-green { background: rgba(16,185,129,0.12); color: #047857; }
.tag {
  display: inline-block; padding: 2px 12px; border-radius: var(--radius-sm); font-size: 0.75rem;
  background: var(--border); color: var(--text-light); transition: var(--transition);
}
.tag:hover { background: var(--primary); color: #fff; }
/* ===== 导航 Dock ===== */
.site-header {
  position: fixed; top: 16px; left: 0; right: 0; z-index: 1000;
  display: flex; justify-content: center; pointer-events: none;
}
.nav-dock {
  pointer-events: auto;
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.85); backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid rgba(226,232,240,0.6);
  border-radius: var(--radius-xl);
  padding: 6px 20px 6px 24px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  max-width: 780px; width: 100%;
  transition: var(--transition);
}
.nav-dock:hover { box-shadow: 0 12px 48px rgba(0,0,0,0.12); }
.nav-brand { font-size: 1.25rem; font-weight: 800; color: var(--primary); white-space: nowrap; letter-spacing: -0.3px; margin-right: 12px; }
.nav-brand span { color: var(--secondary); }
.nav-links { display: flex; align-items: center; gap: 4px; flex: 1; }
.nav-links a {
  padding: 8px 16px; border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500;
  color: var(--text-light); transition: var(--transition); position: relative;
}
.nav-links a:hover { color: var(--text); background: rgba(37,99,235,0.06); }
.nav-links a.active { color: var(--primary); background: rgba(37,99,235,0.1); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-search {
  display: flex; align-items: center; background: var(--border-light); border-radius: var(--radius-md);
  padding: 0 12px; border: 1px solid transparent; transition: var(--transition);
}
.nav-search:focus-within { border-color: var(--primary-light); background: #fff; box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.nav-search input { border: none; background: transparent; padding: 8px 0; font-size: 0.85rem; width: 120px; color: var(--text); }
.nav-search input::placeholder { color: var(--text-light); }
.nav-search i { color: var(--text-light); font-size: 0.85rem; }
.nav-cta { padding: 8px 20px; border-radius: var(--radius-md); background: var(--primary); color: #fff; font-size: 0.85rem; font-weight: 600; }
.nav-cta:hover { background: var(--primary-dark); transform: scale(1.02); }
.nav-toggle { display: none; font-size: 1.2rem; color: var(--text); padding: 6px 10px; border-radius: var(--radius-sm); }
.nav-toggle:hover { background: var(--border); }
/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center; position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #0f172a 100%);
  overflow: hidden; padding-top: var(--nav-height);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center; opacity: 0.2;
  filter: saturate(0.6);
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: radial-gradient(ellipse at 30% 50%, rgba(37,99,235,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(124,58,237,0.1) 0%, transparent 50%);
}
.hero .container { position: relative; z-index: 2; width: 100%; }
.hero-content { max-width: 720px; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; padding: 6px 18px; border-radius: 20px; background: rgba(37,99,235,0.15); border: 1px solid rgba(37,99,235,0.2); color: #93c5fd; font-size: 0.85rem; margin-bottom: 24px; }
.hero-badge i { font-size: 0.75rem; color: var(--primary-light); }
.hero h1 { font-size: 3.6rem; font-weight: 800; line-height: 1.15; color: #fff; letter-spacing: -1px; margin-bottom: 20px; }
.hero h1 span { background: linear-gradient(135deg, #60a5fa, #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.15rem; color: #94a3b8; line-height: 1.8; max-width: 580px; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 56px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.08); }
.hero-stat h3 { font-size: 1.8rem; font-weight: 700; color: #fff; }
.hero-stat h3 span { color: var(--primary-light); }
.hero-stat p { font-size: 0.85rem; color: #64748b; margin-bottom: 0; }
/* ===== 核心说明 ===== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 36px 28px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-icon { width: 52px; height: 52px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 1.3rem; margin-bottom: 20px; }
.feature-icon.blue { background: rgba(37,99,235,0.1); color: var(--primary); }
.feature-icon.purple { background: rgba(124,58,237,0.1); color: var(--secondary); }
.feature-icon.amber { background: rgba(245,158,11,0.1); color: var(--accent); }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 0.92rem; color: var(--text-light); line-height: 1.7; }
/* ===== 分类入口 ===== */
.category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.category-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: var(--bg-card); box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: var(--transition); display: flex; flex-direction: column;
}
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.category-card .card-img { height: 200px; overflow: hidden; }
.category-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.category-card:hover .card-img img { transform: scale(1.05); }
.category-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.category-card .card-body h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.category-card .card-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.category-card .card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--border); }
.category-card .card-footer .tag { font-size: 0.75rem; }
.category-card .card-footer a { font-size: 0.85rem; font-weight: 600; color: var(--primary); }
.category-card .card-footer a:hover { gap: 6px; }
/* ===== 最新资讯列表 ===== */
.news-list { display: grid; grid-template-columns: 1fr; gap: 20px; }
.news-item {
  display: flex; gap: 20px; background: var(--bg-card); border-radius: var(--radius-md);
  padding: 20px; box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: var(--transition); align-items: flex-start;
}
.news-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
.news-item .news-thumb { width: 120px; height: 90px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; }
.news-item .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-item .news-info { flex: 1; }
.news-item .news-info h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.news-item .news-info h3 a:hover { color: var(--primary); }
.news-item .news-info p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; align-items: center; gap: 16px; margin-top: 8px; font-size: 0.78rem; color: var(--text-light); }
.news-meta .badge { font-size: 0.7rem; padding: 2px 10px; }
/* ===== 数据流程 ===== */
.stats-section { background: var(--bg-dark); position: relative; overflow: hidden; }
.stats-section::before {
  content: ''; position: absolute; inset: 0; z-index: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover; background-position: center; opacity: 0.06;
}
.stats-section .container { position: relative; z-index: 1; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.stat-card { text-align: center; padding: 32px 16px; }
.stat-card .stat-number { font-size: 2.6rem; font-weight: 800; color: #fff; margin-bottom: 6px; }
.stat-card .stat-number span { color: var(--primary-light); }
.stat-card .stat-label { font-size: 0.92rem; color: #94a3b8; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 64px; }
.step-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-lg); padding: 32px 24px; text-align: center; transition: var(--transition); }
.step-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
.step-number { width: 48px; height: 48px; border-radius: 50%; background: rgba(37,99,235,0.2); color: var(--primary-light); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 700; margin: 0 auto 16px; }
.step-card h4 { font-size: 1.05rem; font-weight: 600; color: #fff; margin-bottom: 8px; }
.step-card p { font-size: 0.88rem; color: #94a3b8; line-height: 1.6; }
/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; background: var(--bg-card); transition: var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question { padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; font-size: 1rem; font-weight: 600; cursor: pointer; background: none; width: 100%; text-align: left; color: var(--text); }
.faq-question i { font-size: 0.85rem; color: var(--text-light); transition: var(--transition); }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-answer { padding: 0 24px 18px; font-size: 0.92rem; color: var(--text-light); line-height: 1.7; display: none; }
.faq-item.active .faq-answer { display: block; }
/* ===== CTA ===== */
.cta-section { background: linear-gradient(135deg, var(--primary-dark), var(--secondary)); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; opacity: 0.08; z-index: 0; }
.cta-section .container { position: relative; z-index: 1; }
.cta-box { text-align: center; padding: 64px 0; }
.cta-box h2 { font-size: 2.2rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.cta-box p { font-size: 1.05rem; color: #c7d2fe; margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-box .btn { font-size: 1.05rem; padding: 16px 40px; }
/* ===== 页脚 ===== */
.site-footer { background: var(--bg-dark); color: #94a3b8; padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand h3 { font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-brand h3 span { color: var(--primary-light); }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 0.92rem; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 0.85rem; color: #64748b; padding: 4px 0; }
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.8rem; }
.footer-bottom a { color: #64748b; }
.footer-bottom a:hover { color: var(--primary-light); }
/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.8rem; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .hero-stat h3 { font-size: 1.4rem; }
  .nav-dock { padding: 6px 14px; max-width: 94%; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: rgba(255,255,255,0.96); backdrop-filter: blur(20px); border-radius: var(--radius-lg); padding: 12px; margin-top: 8px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
  .nav-links a { padding: 12px 16px; }
  .nav-search { display: none; }
  .nav-toggle { display: block; }
  .features-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; }
  .news-item .news-thumb { width: 100%; height: 180px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; }
  .cta-box h2 { font-size: 1.6rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.6rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .section-title { font-size: 1.4rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .news-item .news-thumb { height: 140px; }
}

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #f59e0b;
            --accent: #10b981;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-full: 9999px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            padding-top: var(--nav-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        ul,
        ol {
            list-style: none;
        }
        input,
        button,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            margin-bottom: 0.75rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            margin-bottom: 0.5rem;
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.1rem;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: #059669;
            border-color: #059669;
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-dark {
            background: var(--bg-dark);
            color: #fff;
            border-color: var(--bg-dark);
        }
        .btn-dark:hover {
            background: #1e293b;
            border-color: #1e293b;
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .badge-secondary {
            background: #fef3c7;
            color: #b45309;
        }
        .badge-accent {
            background: #d1fae5;
            color: #065f46;
        }

        /* ===== Header / Nav (Floating Dock) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 24px;
            background: transparent;
            pointer-events: none;
        }
        .site-header .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            padding: 0 28px;
            border-radius: var(--radius-full);
            box-shadow: 0 4px 32px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.5);
            height: 58px;
            transition: var(--transition);
        }
        .site-header .nav-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .site-header .nav-brand span {
            color: var(--primary);
        }
        .site-header .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .site-header .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .site-header .nav-links a:hover,
        .site-header .nav-links a.active {
            background: var(--primary);
            color: #fff;
        }
        .site-header .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .site-header .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: var(--radius-full);
            padding: 4px 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .site-header .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }
        .site-header .nav-search i {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .site-header .nav-search input {
            background: transparent;
            border: none;
            padding: 8px 0;
            font-size: 0.9rem;
            min-width: 140px;
            color: var(--text);
        }
        .site-header .nav-search input::placeholder {
            color: var(--text-light);
        }
        .site-header .nav-cta {
            padding: 8px 22px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.85rem;
            transition: var(--transition);
            border: 2px solid var(--primary);
        }
        .site-header .nav-cta:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: scale(1.02);
            color: #fff;
        }
        .site-header .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .site-header .nav-toggle:hover {
            background: var(--bg-alt);
        }

        /* Mobile Nav */
        @media (max-width: 1024px) {
            .site-header .nav-dock {
                padding: 0 18px;
            }
            .site-header .nav-links {
                position: fixed;
                top: calc(var(--nav-height) + 8px);
                left: 16px;
                right: 16px;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-radius: var(--radius);
                box-shadow: var(--shadow-hover);
                border: 1px solid var(--border);
                flex-direction: column;
                padding: 16px;
                gap: 8px;
                display: none;
                z-index: 999;
            }
            .site-header .nav-links.open {
                display: flex;
            }
            .site-header .nav-links a {
                width: 100%;
                text-align: center;
                padding: 12px;
                font-size: 1rem;
            }
            .site-header .nav-search {
                display: none;
            }
            .site-header .nav-cta {
                display: none;
            }
            .site-header .nav-toggle {
                display: block;
            }
        }
        @media (max-width: 520px) {
            .site-header .nav-dock {
                padding: 0 12px;
                height: 52px;
            }
            .site-header .nav-brand {
                font-size: 1.2rem;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 80px 0 60px;
            background-size: cover;
            background-position: center;
            position: relative;
            isolation: isolate;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 41, 59, 0.6) 100%);
            z-index: 0;
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .article-hero .badge {
            font-size: 0.85rem;
            padding: 0.35rem 1.2rem;
        }
        .article-hero h1 {
            color: #fff;
            font-size: 2.6rem;
            max-width: 800px;
            margin: 0 auto 1rem;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            flex-wrap: wrap;
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta i {
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 60px 0 40px;
                min-height: 280px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .meta {
                font-size: 0.85rem;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }
        }

        /* ===== Article Body ===== */
        .article-body {
            padding: 60px 0 40px;
            background: var(--bg);
        }
        .article-body .container {
            max-width: 820px;
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content h2,
        .article-body .content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.25rem;
            color: var(--text-light);
        }
        .article-body .content ul,
        .article-body .content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
            color: var(--text-light);
        }
        .article-body .content ul {
            list-style: disc;
        }
        .article-body .content ol {
            list-style: decimal;
        }
        .article-body .content li {
            margin-bottom: 0.5rem;
        }
        .article-body .content img {
            border-radius: var(--radius);
            margin: 2rem auto;
            box-shadow: var(--shadow);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-alt);
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content a:hover {
            color: var(--primary-dark);
        }
        .not-found-block {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-block h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
        }
        .not-found-block p {
            color: var(--text-light);
            margin-bottom: 2rem;
        }

        /* ===== Share Section ===== */
        .share-section {
            padding: 20px 0 40px;
            border-top: 1px solid var(--border);
            margin-top: 40px;
        }
        .share-section .container {
            max-width: 820px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .share-section .share-label {
            font-weight: 600;
            color: var(--text);
        }
        .share-section .share-buttons {
            display: flex;
            gap: 10px;
        }
        .share-section .share-buttons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            background: var(--bg-alt);
            color: var(--text-light);
            font-size: 1.1rem;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .share-section .share-buttons a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Related Posts ===== */
        .related-posts {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .related-posts .section-title h2 {
            color: var(--text);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body .badge {
            font-size: 0.7rem;
            padding: 0.15rem 0.8rem;
            margin-bottom: 0.5rem;
        }
        .related-card .card-body h4 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--text);
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .related-card .card-body a {
            color: inherit;
        }
        .related-card .card-body a:hover h4 {
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary);
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 1rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 2rem;
            font-size: 1.1rem;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .cta-section .btn:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
        }

        /* ===== Footer (Shared) ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 60px 0 30px;
        }
        .site-footer .container {
            max-width: var(--container);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .site-footer .footer-brand h3 {
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }
        .site-footer .footer-brand h3 span {
            color: var(--primary);
        }
        .site-footer .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 1.2rem;
            font-weight: 600;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            padding-top: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a {
            color: var(--primary);
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 1024px) {
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
        }
        @media (max-width: 768px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Responsive Utilities ===== */
        @media (max-width: 1024px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .article-body .container {
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .article-body .content {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .article-hero {
                min-height: 220px;
                padding: 40px 0 30px;
            }
            .article-body {
                padding: 30px 0 20px;
            }
            .share-section .container {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===== Smooth Scrollbar & Selection ===== */
        ::selection {
            background: var(--primary);
            color: #fff;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-alt);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6C5CE7;
            --primary-light: #8B7CF0;
            --primary-dark: #4A3DB8;
            --primary-bg: rgba(108, 92, 231, 0.08);
            --secondary: #FF6B35;
            --secondary-light: #FF8A5C;
            --secondary-dark: #E0552A;
            --accent-gold: #F0C929;
            --bg: #0D0D1A;
            --bg-card: #16162A;
            --bg-elevated: #1E1E3A;
            --bg-hero: #0A0A18;
            --text: #F0F0F5;
            --text-muted: #9A9ABF;
            --text-soft: #C0C0E0;
            --border: #2A2A4A;
            --border-light: #3A3A5A;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 40px rgba(108, 92, 231, 0.15);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
            --transition-slow: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
            --container-max: 1200px;
            --header-height: 80px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Typography ===== */
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary-light);
            background: var(--primary-bg);
            padding: 4px 16px;
            border-radius: 100px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text);
        }

        .section-sub {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 600px;
            margin-top: 12px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 26px;
            }
            .section-sub {
                font-size: 15px;
            }
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: var(--primary);
            border-radius: 100px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 32px rgba(108, 92, 231, 0.4);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 4px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            border-radius: 100px;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background: var(--border);
            border-color: var(--border-light);
            transform: translateY(-2px);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 4px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-soft);
            border-radius: 100px;
            transition: var(--transition);
        }
        .btn-ghost:hover {
            background: var(--bg-elevated);
            color: var(--text);
        }

        @media (max-width: 520px) {
            .btn-primary,
            .btn-secondary {
                padding: 12px 24px;
                font-size: 14px;
            }
        }

        /* ===== Tags / Badges ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-soft);
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            border-radius: 100px;
            transition: var(--transition);
        }
        .tag:hover {
            border-color: var(--primary);
            color: var(--primary-light);
        }
        .tag-hot {
            background: rgba(255, 107, 53, 0.15);
            border-color: rgba(255, 107, 53, 0.3);
            color: var(--secondary-light);
        }
        .tag-new {
            background: rgba(108, 92, 231, 0.15);
            border-color: rgba(108, 92, 231, 0.3);
            color: var(--primary-light);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 12px;
            font-size: 12px;
            font-weight: 700;
            border-radius: 100px;
        }
        .badge-primary {
            background: var(--primary);
            color: #fff;
        }
        .badge-secondary {
            background: var(--secondary);
            color: #fff;
        }

        /* ===== Header / Dock Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 16px 24px;
            pointer-events: none;
        }
        .nav-dock {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 28px;
            height: 64px;
            background: rgba(22, 22, 42, 0.85);
            backdrop-filter: blur(20px) saturate(1.3);
            -webkit-backdrop-filter: blur(20px) saturate(1.3);
            border: 1px solid var(--border);
            border-radius: 40px;
            box-shadow: var(--shadow-md), var(--shadow-glow);
            pointer-events: auto;
            transition: var(--transition);
        }
        .nav-dock:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
        }

        .nav-brand {
            font-size: 22px;
            font-weight: 900;
            letter-spacing: -0.03em;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 2px;
            flex-shrink: 0;
        }
        .nav-brand span {
            color: var(--primary-light);
        }
        .nav-brand i {
            font-size: 20px;
            color: var(--secondary);
            margin-right: 6px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 100px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--text);
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            border-radius: 100px;
            color: var(--text-muted);
            transition: var(--transition);
            width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            background: var(--bg-card);
            color: var(--text);
            width: 220px;
        }
        .nav-search i {
            font-size: 14px;
            flex-shrink: 0;
        }
        .nav-search input {
            flex: 1;
            font-size: 13px;
            background: transparent;
            color: var(--text);
            min-width: 0;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-cta {
            padding: 8px 22px;
            font-size: 13px;
            font-weight: 700;
            color: #fff;
            background: var(--secondary);
            border-radius: 100px;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.25);
        }
        .nav-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-1px) scale(1.03);
            box-shadow: 0 6px 24px rgba(255, 107, 53, 0.35);
        }

        .nav-toggle {
            display: none;
            font-size: 22px;
            color: var(--text);
            padding: 6px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-elevated);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 4px;
        }

        /* Mobile Nav */
        @media (max-width: 900px) {
            .site-header {
                padding: 12px 16px;
            }
            .nav-dock {
                padding: 0 18px;
                height: 58px;
            }
            .nav-links {
                position: fixed;
                top: 76px;
                left: 16px;
                right: 16px;
                flex-direction: column;
                background: rgba(22, 22, 42, 0.96);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                border: 1px solid var(--border);
                border-radius: var(--radius-lg);
                padding: 12px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                display: none;
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 18px;
                font-size: 16px;
                width: 100%;
                text-align: center;
            }
            .nav-search {
                width: 140px;
            }
            .nav-search:focus-within {
                width: 160px;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .nav-dock {
                padding: 0 14px;
                height: 54px;
            }
            .nav-brand {
                font-size: 18px;
            }
            .nav-brand i {
                font-size: 16px;
            }
            .nav-search {
                width: 100px;
                padding: 4px 12px;
            }
            .nav-search:focus-within {
                width: 120px;
            }
            .nav-search input {
                font-size: 12px;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 140px 0 80px;
            background: var(--bg-hero);
            overflow: hidden;
            isolation: isolate;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
            filter: saturate(0.8) brightness(0.6);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 13, 26, 0.88) 0%, rgba(13, 13, 26, 0.6) 50%, rgba(108, 92, 231, 0.15) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-light);
            background: rgba(108, 92, 231, 0.15);
            border: 1px solid rgba(108, 92, 231, 0.25);
            border-radius: 100px;
            margin-bottom: 20px;
            backdrop-filter: blur(8px);
        }
        .hero-badge i {
            font-size: 14px;
        }
        .page-hero h1 {
            font-size: 52px;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.1;
            color: var(--text);
            margin-bottom: 16px;
        }
        .page-hero h1 span {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 6px 6px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 100px;
            width: 400px;
            max-width: 100%;
            transition: var(--transition);
        }
        .hero-search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
        }
        .hero-search-box i {
            color: var(--text-muted);
            font-size: 15px;
        }
        .hero-search-box input {
            flex: 1;
            padding: 10px 0;
            font-size: 15px;
            background: transparent;
            color: var(--text);
            min-width: 0;
        }
        .hero-search-box input::placeholder {
            color: var(--text-muted);
        }
        .hero-search-box button {
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: var(--primary);
            border-radius: 100px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .hero-search-box button:hover {
            background: var(--primary-light);
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 120px 0 60px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .hero-search-box {
                width: 100%;
                padding: 4px 4px 4px 16px;
            }
            .hero-search-box input {
                font-size: 14px;
                padding: 8px 0;
            }
            .hero-search-box button {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 26px;
            }
            .hero-badge {
                font-size: 11px;
                padding: 4px 14px;
            }
            .hero-actions {
                flex-direction: column;
            }
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Category Grid ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .category-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.05), rgba(255, 107, 53, 0.05));
            opacity: 0;
            transition: var(--transition);
            z-index: 0;
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-card>* {
            position: relative;
            z-index: 1;
        }
        .category-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary-light);
            background: var(--primary-bg);
            border: 1px solid rgba(108, 92, 231, 0.15);
            transition: var(--transition);
        }
        .category-card:hover .category-icon {
            background: rgba(108, 92, 231, 0.15);
            transform: scale(1.05);
        }
        .category-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .category-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .category-card .tag {
            margin-top: 16px;
        }

        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Guide Cards ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .guide-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: var(--transition-slow);
        }
        .guide-card:hover .guide-card-img {
            transform: scale(1.03);
        }
        .guide-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card-body .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 10px;
        }
        .guide-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 8px;
            color: var(--text);
            transition: var(--transition);
        }
        .guide-card:hover .guide-card-body h3 {
            color: var(--primary-light);
        }
        .guide-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }
        .guide-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .guide-card-meta i {
            margin-right: 4px;
        }
        .guide-card-meta .author {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .guide-card-meta .author img {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            object-fit: cover;
        }

        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .guide-card-img {
                height: 180px;
            }
        }

        /* ===== Featured / Wide Block ===== */
        .featured-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 48px 52px;
            transition: var(--transition);
        }
        .featured-block:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-md);
        }
        .featured-block .text h2 {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 14px;
            color: var(--text);
        }
        .featured-block .text p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .featured-block .text .features {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 24px;
        }
        .featured-block .text .features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-soft);
        }
        .featured-block .text .features li i {
            color: var(--primary-light);
            font-size: 16px;
        }
        .featured-block .image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .featured-block .image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            display: block;
            transition: var(--transition-slow);
        }
        .featured-block:hover .image img {
            transform: scale(1.02);
        }

        @media (max-width: 900px) {
            .featured-block {
                grid-template-columns: 1fr;
                padding: 32px 28px;
                gap: 24px;
            }
            .featured-block .text h2 {
                font-size: 24px;
            }
            .featured-block .image img {
                height: 240px;
            }
        }
        @media (max-width: 520px) {
            .featured-block {
                padding: 24px 18px;
            }
            .featured-block .text h2 {
                font-size: 20px;
            }
        }

        /* ===== Timeline / Updates ===== */
        .updates-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }
        .update-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 18px 22px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .update-item:hover {
            border-color: var(--border-light);
            transform: translateX(4px);
            box-shadow: var(--shadow-sm);
        }
        .update-item .badge-date {
            flex-shrink: 0;
            width: 64px;
            text-align: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--text-muted);
            background: var(--bg-elevated);
            padding: 6px 8px;
            border-radius: var(--radius-sm);
            line-height: 1.3;
        }
        .update-item .badge-date strong {
            display: block;
            font-size: 18px;
            color: var(--text);
        }
        .update-item .info {
            flex: 1;
            min-width: 0;
        }
        .update-item .info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .update-item:hover .info h4 {
            color: var(--primary-light);
        }
        .update-item .info p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .update-item .tag {
            flex-shrink: 0;
        }

        @media (max-width: 600px) {
            .update-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 14px 16px;
            }
            .update-item .badge-date {
                width: 54px;
                font-size: 12px;
            }
            .update-item .badge-date strong {
                font-size: 15px;
            }
            .update-item .info h4 {
                font-size: 14px;
            }
        }

        /* ===== Experts / Authors ===== */
        .experts-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .expert-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 20px 22px;
            text-align: center;
            transition: var(--transition);
        }
        .expert-card:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .expert-card .avatar {
            width: 72px;
            height: 72px;
            margin: 0 auto 14px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid var(--border);
            transition: var(--transition);
        }
        .expert-card:hover .avatar {
            border-color: var(--primary);
            transform: scale(1.05);
        }
        .expert-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }
        .expert-card .role {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .expert-card .stats {
            display: flex;
            justify-content: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .expert-card .stats span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .expert-card .stats i {
            color: var(--primary-light);
        }

        @media (max-width: 1024px) {
            .experts-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .experts-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: none;
            text-align: left;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary-light);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 0 0 1px rgba(108, 92, 231, 0.2);
        }

        @media (max-width: 520px) {
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 16px 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(108, 92, 231, 0.08), transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(255, 107, 53, 0.06), transparent 60%);
            z-index: 0;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--text);
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            font-size: 16px;
            padding: 16px 40px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 15px;
            }
        }
        @media (max-width: 520px) {
            .cta-section {
                padding: 32px 18px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 56px 0 28px;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 900;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: 12px;
        }
        .footer-brand h3 span {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--primary-light);
        }
        .footer-bottom a:hover {
            text-decoration: underline;
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .site-footer {
                padding: 40px 0 20px;
                margin-top: 56px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Animations ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Responsive Helpers ===== */
        @media (max-width: 768px) {
            .hide-mobile {
                display: none !important;
            }
        }
        @media (min-width: 769px) {
            .hide-desktop {
                display: none !important;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--border-light);
        }

        /* ======== Selection ======== */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

        /* ======== Focus visible ======== */
        :focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 4px;
        }